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How To Install SVT Lightning Heater Hose Kit | 1993-95

In this article we’re going to be checking out LMR's factory-style heater hose kit & how to install for the 1993 to 1995 First Gen Ford Lightnings.

Viewing this install and using the information shared is subject to the terms set forth here - View the LMR Install Instructions Disclaimer.

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How To Install SVT Lightning Heater Hose Kit | 93-95 - How To Install SVT Lightning Heater Hose Kit | 93-95

So the back story on how this kit came to fruition is simple; we were wanting a heater hose kit that included the necessary components to restore the heater hoses on your Lightning all while retaining a factory look. First, we're going to talk about a few of the parts on this 93-95 SVT Lightning Factor Style Heater Hose Kit that stand out the most and bolsters our phenomenal attention to detail.

The abrasion-resistant tubing sections in this are pre-cut to the correct length and feature the same durometer as the factory pieces. These install over the supply and return hose and protect these hoses from rubbing against the vacuum canister.

Now since the F-150s fell under the same TSB as the Fox Mustangs and other Ford vehicles from this era, we include a heater core flow restrictor. This installs into the supply hose and helps regulate the flow of coolant so that the heater core does not over-pressurize.

The last detail-oriented part is the pre-bent metal tube and short hose assembly that attaches to the alternator and installs onto the fitting in the water pump.

Alongside these great parts will be:

  • (2) sections of heater hose for the supply and return
  • (5) factory-style constant tension hose clamps
  • (6) 12-inch butyl strips to fill the void at the firewall around the heater core fittings

Today, we are going to install this kit into our 1995 Lightning here in the shop. We also have an article explaining how to flush the cooling system in your Lightning.


(Please see time stamps next to each step to reference specific install steps in the video above.)

  1. Before you start, verify that the truck is not at operating temperature or it’s had adequate time to cool off if you were driving it. | (1:36)

  2. Whenever that has been verified, position a clean drain pan or bucket underneath the drain plug on the radiator. Depending on the ride height of your truck, you may need to safely lift the front of the vehicle and support it with jack stands. | (1:43)

  3. Open the radiator cap to vent the cooling system. | (1:49)

  4. Remove or open the drain plug and let the coolant drain. Allow a good amount of coolant to drain from the system and then close the drain plug. | (1:52)

  5. For additional working room near the water pump, it may be necessary to remove the serpentine belt; although this is an optional step. To do this, rotate the belt tensioner counterclockwise with a 15mm socket and break-over bar to release tension. Go ahead and remove the belt. | (1:58)

  6. Locate the hoses at the firewall; slide a rag under these hoses to absorb any coolant that runs out. | (2:12)

  7. Slide both of these clamps down the hoses with a pair of pliers or a dedicated set of constant tension hose clamp pliers. | (2:17)

  8. If needed, remove the existing butyl sealer from the firewall. | (2:23)

  9. Depending on the age of the truck and the condition of the hoses, they may not easily slide off of the heater core. If they don’t, simply cut the hose. | (2:27)

  10. We’re going to remove the return hose first, so remove the 1/2-inch bolt from the alternator. | (2:35)

  11. Slide back the clamp. | (2:40)

  12. Position a rag underneath the hose that is connected to the water pump. Depending on how much coolant was drained, there may be some coolant that runs out of the water pump. | (2:42)

  13. Remove the hose from the pump and this portion can be removed from the truck. | (2:50)

  14. Similar to the return hose, cut the supply hose if needed. | (2:54)

  15. Slide back the clamp on the supply hose and remove the hose from the straight fitting. | (2:57)

  16. If you had to cut the supply and return hoses, you’ll need to fully remove the short sections of hose that are still connected to
  17. the heater core. | (3:00)

  18. To do this, carefully make an incision with a razor blade and then remove the hose from the heater core. Do this for the other hose. Another optional step is to remove and clean the straight fitting. Use a 3/4-inch open-end wrench on the fitting to remove it from the adapter in the lower intake. | (3:08)

  19. At this time, you can clean and remove some of the ugly butyl from around the heater core fittings. | (3:15)

  20. After that, we’ll need to install the flow restrictor into the supply hose. Since this will be a tight fit, I would lubricate the flow restrictor with a touch of WD-40 or a thin film of dielectric grease. | (3:20)

  21. You’ll want to install this restrictor with the tapered end facing towards the flow of coolant and on the end of the hose that will connect to the heater core. Push the flow restrictor inside of the hose a few inches with a socket. | (3:32)

  22. To help ease the installation of the new hoses onto their respective fittings, lubricate the inside of the hoses. Go ahead position one of the constant tension clamps over the supply hose and slide it over the heater core fitting that is closest to the driver side of the truck. | (3:45)

  23. Don’t position the clamp just yet as we still need to install some of the provided butyl which we’ll do towards the end of the article. | (4:00)

  24. Slide one of the abrasion-resistant tubing sections over the supply hose. If any of the mold release agents from inside of the tube rubbed off onto the supply hose, wipe this off with some brake clean and a towel. | (4:07)

  25. Position another clamp over the hose and install the hose onto the straight fitting. You can go ahead and situate this clamp into place. | (4:10)

  26. Lubricate the short section of the hose on the metal hose assembly. | (4:18)

  27. Position this into place and slide a clamp over the hose. While you’re holding the clamp with the pliers; install the hose onto the fitting in the water pump and then situate the clamp into place. | (4:21)

  28. Check and see if the tab on the metal hose aligns with the alternator. If it doesn’t, depress the clamp and reclock the hose until the tab aligns with the bolt hole in the alternator. | (4:30)

  29. Reinstall the bolt and tighten it down. | (4:42)

  30. If it’s needed, carefully clock the metal tube so that the fitting faces towards the 9 o’clock position. | (4:48)

  31. Next, we’ll mock up the return hose. Lubricate both ends of the hose and install it onto the heater core. Follow the supply hose and hold the hose alongside the metal tube. | (4:54)

  32. You may have to cut the return hose to length. Whenever this is done, remove the hose from each fitting. | (5:03)

  33. Slide a clamp onto the hose and install the hose onto the heater core. Don’t position this clamp into place just yet. | (5:08)

  34. Slide the other section of the abrasion-resistant tubing over the return hose. Wipe off any mold release agents that may have rubbed off onto the hose. | (5:15)

  35. Position a clamp over the hose and install the return hose over the metal tube. Go ahead and situate the clamp. | (5:20)

  36. Align the abrasion-resistant tubing and make sure that these are positioned above the vacuum canister which is the factory location. | (5:27)

  37. Use the provided butyl sealer to seal the area on the area firewall around the heater core fittings. Tear it into small sections and lightly push it into place. A small plastic pry tool will help with this as well as smoothing it out whenever you have applied enough butyl. | (5:33)

  38. Go ahead and situate the clamps. | (5:50)

  39. Remove the cap from the radiator and reuse the coolant that was just removed, or use fresh coolant; it’s up to you. | (5:53)

  40. Close the cap on the radiator, thoroughly clean the area, reinstall the serpentine belt, double-check your work and then start your truck. After that, you’re good to go! | (6:00)

Final Thoughts

Alright, guys! There is no doubt about it. We really like this heater hose kit! Especially since we include everything you need with the exception of a few tools and installation materials. Now that we have this kit installed, it looks just like the original components which was our main goal when curating this heater hose kit. And honestly, what’s not to love about factory-looking replacement parts?!

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1993-95 Ford Lightning HVAC

About the Video

How To Install SVT F-150 Lightning Heater Hose Kit (93-95)

Check out our YouTube channel for even more tech tips, installation videos, how-tos, and more. The best place to go for anything Mustang related!

Published on 2021-01-15
Buy Factory Style Heater Hose Kit: http://latemodelres.to/18472A-K

Watch How To Flush Your Lightning Cooling System: https://youtu.be/kwNS8O_FIXA

Replace the brittle, corroded, or kinked heater hoses on your 1993-1995 SVT Lightning with this detailed oriented factory style heater hose kit from industry leader LMR! From the factory, the first generation Lightning trucks were equipped with a very intricate heater hose setup. Over time, these components begin to deteriorate, leak, or become clogged. In order to restore proper coolant flow to your heater core while retaining a factory appearance, LMR went above and beyond to provide a complete solution based heater hose kit for Lightning enthusiasts.

High Quality Materials
In order to bolster the phenomenal attention to detail, LMR utilized only the highest quality of materials when assembling this kit for you. Featuring the correct metal heater hose supply tube, this tube is manufactured from durable steel and is pre-bent to properly attach to the alternator and connect the water pump to the heater hose leading to the return side of the heater core. Eliminating leaks on your Lightning is a breeze with brand new heater hoses with the correct inner diameter and length. To protect the new heater hoses from the vacuum canister, LMR provides two sections of pre-cut abrasion resistant tubing that install over the factory heater supply and return hoses. Since the F-150 fell under the same TSB as the Fox Body Mustang and other Ford vehicles of this era, LMR includes the appropriate heater core flow restrictor. This restrictor installs into the supply hose and helps regulate the flow of coolant to prevent the heater core from over pressurizing. Securing the all new heater hoses are five, factory style constant tension hose clamps to prolong the life of the hoses by applying equal pressure all the way around. Six 12 inch strips of butyl are utilized to recreate the firewall grommet around the heater core fittings to seal out moisture and debris while providing the ultimate factory appearance under the hood of your Lightning! Ensure your heater core is receiving the proper flow of coolant while retaining the factory looks of your truck for years to come!

Installation Note
The supply and return heater hoses may have excess material and may require some trimming to fit
The tab that mounts this tube to the alternator may need to be bent slightly to line up with the bolt hole.

Fits 1993-1995 SVT F-150 SVT Lightning

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Use of this video is subject to the terms as set forth in our LMR Install Video Disclaimer | https://lmr.com/page/lmr-install-video-disclaimer